To Blackhawk!
I certainly hope you haven't loaded those .44-240g jacketed pills with 23.0g of 2400! That is a problem that won't wait to happen! OVERMAX BEYOND THE MAX!! I wouldn't shoot those in any .44! If you have loaded them, dig out the bullet puller!
As for the loads using our .44-250g LFNGC bullet, what Bill M. says concerning case capacity and bullet intrusion into the case is absolutely right! If you compare the .44-250g LFNGC bullet to jacketed or other cast (swc) bullets of the same weight, the LFN compromises MUCH less space.
The .44-250g LFNGC bullet only intrudes 0.295" into the mouth of the case when seated to the .450" NTC length crimp groove. This equates to about the same case intrusion as a .44-200g Hornady XTP! Combine the gained case capacity of the LFN over conventional 240-250 grain bullets along with a lower friction coefficient for the hard cast bullet, and you have the makings for a bullet with some very unique loading characteristics.
All this being said, I will tell all here that I have shot great numbers of these loaded with this load:
BTB .44-250g LFNGC/27.7g H110/WLPP/Federal Brass
Be aware that both Remington and Starline will have reduced case capacities due to thicker brass, and a change in primers with this load may spike pressures as well. However, while being an upper end load, it is not an against-the-wall load.
Anything beyond this must be approached with much caution, discretion and attention to the individual characteristics of the firearm used to work up the load.
Also, be aware that loads worked up now, in the winter can, and will behave much differently as temperatures increase through the spring and summer months! What is safe in January when your shooting range is 26 degrees, can easily be well over pressure once amient temperatures reach 70 degrees!
If you will notice, whenever I post a load workup, especially one that I feel is at or near top end, I include the temperature at which the testing was done... very important information! (worthy of a new thread here)
Keep these factors in mind, and enjoy. But lastly, Blackhawk, DON'T SHOOT THOSE HOT LOADS OF 2400!
God Bless,
Marshall